Chemical formula

Chemical formula . It is a symbolic representation of the molecule or structural unit of a substance in which the quantity or proportion of atoms that take part in the compound is indicated.

Summary

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• 1 Types of chemical formulas
  • 1 Molecular Formulas
    • 1.1 Examples
  • 2 Structural Formula
  • 3 Empirical Formula
• 2 Use
• 3 Sources

Types of chemical formulas

Molecular Formulas

They are those that indicate the numbers and types of atoms in a molecule.

Examples

H ₂ O

HCl

O ₂

F ₂

Structural Formula

The arrangement of atoms and how they bond to form molecules are represented . These formulas, in turn, are classified into:

Developed: all links are represented.

H H

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HCC-Br

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H H

Semi-developed: only the fundamental links are shown.

CH ₃ -CH ₂ -Br (Bromoethane or Ethyl Bromide)

Empirical formula

Indicates the proportion of the different atoms that make up said compound. Thus , Sodium Chloride is represented by: NaCl, Na ₅₀ Cl ₅₀ or in general Na _x Cl _x . More by convention the smaller integer subscripts are used.

Use

Chemical formulas are used to express the composition of molecules and ionic compounds , using chemical symbols.